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}} Polonium dibromide (also known as polonium(II) bromide) is a chemical compound with the formula PoBr2. It is a purple-brown crystalline solid at room temperature.〔 It sublimes (decomposing slightly) at 110 °C/30 ''μ'' and decomposes when melted in nitrogen gas at 270–280 °C.〔 ==Preparation== Polonium dibromide may be prepared by: *thermal degradation of polonium tetrabromide (PoBr4) in a vacuum at 200 °C;〔 *dehalogenation of polonium tetrabromide by hydrogen sulfide at low temperatures (however, this does not form pure polonium dibromide, even upon heating).〔〔 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Polonium dibromide」の詳細全文を読む スポンサード リンク
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